Guarding device



Oct. 11, 1932. H. G. GUSTAFSSON 1,881,524

GUARDING DEVICE Filed April 24, 1930 2 Sheets-Sheet l MWJW #7 Oct. 11, 1932. H. G. GUSTAFSSON GUARDING DEVICE Filed April 24, 1930 2 Sheets-Sheet i to Patented Oct. 11, 1932 time stares PAT HANS G. GUSTAFSSON, OF CHICAGO, ILLINOIS,A SSIGNOR TO WESTERN ELECTRIC COM PANY, INCORPORATED, 035 NEW YORK, N. Y., A CORPORATION OF NEW YORK GUARDING DEVICE Application filed April 24,

This invention relates to a guarding de vice, and more particularly to a guarding device for a die casting machine.

' An object of this invention is to provide a [5) simple and eflicient guarding device for covering movable parts of a machine. o

' In accordance with this object one embodiment of the invention comprises a hood which is hinged to a support secured to the frame of 10, the machine of which the movable parts are tobe guarded. Rocker levers mounted on a shaft journaled in the support engage projecting portions of the hood, and are rotated by a connecting rod linked to a rocker arm lfifsecured to a power driven shaft of the ma chine to lower and raise the hood over the moving parts thereof. 7 A clear understanding of the invention will be had from the following description "2 when taken in connection with the accordpanying drawings, wherein Fig. l is a side view of a die casting machine with the guarding device attached;

Fig. 2 is an enlarged-side view of the guarding device;

Fig. 3 is a plan viewof the guarding device with a part thereof broken away and shown in section; V i

Fig. 4 is a fragmentary detail view of the 30 hinging structure for the guarding, device,

taken on the line 4-4 of Fig. 3, and

Fig. 5 is a fragmentary cross-sectional view of the hinging structure taken on the line 55 of Fig. 4.

"Referring now to the drawings in which like reference numerals designate similar parts throughout the several views, there is disclosed a threesided hood -which is designed to cover or guard the stationary and movable dies of the die casting machine shown in Fig. 1 when the dies are brought together for the casting operation. This hood consists principally of two vertical side sheets of metal 11 11 and a top horizontal sheet 12, which sheets are supported by framework consisting of vertical angle members 1313 (Figs. 2, 4, and 5) provided on each side of the hood, and horizontal angle members 1414 (Figs. 3 and 5) forming the frame of the hood at the top, the ends of these 1930. Serial No. 446,949.

sheetsare preferably secured together by welding. A pair of vertical metal sheets or strips 15'15 are welded to the edges o f' the left hand side of the hood 10 to fit over the movable die ofthe casting machine. ,A pair of studs 17-17 extendthrough each'sid'e'of the hood 10 and are welded theretoand to a pair of triangular reinforcing members 1818 (Figs. 2 andl5), which are welded adjacent the edges of the angle members'13 and 14 and to the sheets l111. Flat metal straps '21 21 (Fig.2) join the lower ends of the vertical angle members 13-13 and are welded to the vertical sheets '11-11' for reinforcing their lower edges. A pair of spaced hinge straps 20 are weld-ed toLthe right handedge of the top horizontal sheet 12. fl A hinging support for thehood 10 is provided, comprising a pair of side plates .2424

which are secured at the bottomby bolts 2525 to .the' frame .of'the die casting machine, and the inner surfaces of the plates 2424 have a framework welded thereto whichconsists of a pair of verticaljangle members 2626 (Figs. 2 and -5) secured to each side plate, and which are joined at their tops toa transverse angle member 27' (Figs. 2 and 5). A metal sheet 28 (Figs.2 and 4) which serves to reinforce theangular frame workcompr'ising the angle members 26 and 27 is secured by screws 30 to thisang-ular frame work. The screws 30 arranged across the horizontal arm of the U-shaped sheet' 28 also secure'to theframe workan oifset plate 31 (Figs. 2, 4 and-5) to which isfixed by means of a pair .of bolts 3232 igs. 3,4 and 5) the upper endof a-stationary die-plate 29 of the diecastingmachine, (shown in :outline by dot and dash lines) .thelowere'nd of the die plate being supportedon the frame work of the machine. A .pair of spaced hinge straps 33 38 .are welded :to ,the trans verse angle memberl27 and to a pairof slanting angle members 3434 whichare welded to the right hand beveled-edges .of the plates 24-24 which cooperate with a lid 35 which may be lowered over the machine. A cross rod or shaft 36 extends through and is {freely journaled within the loops in the pair of hinge straps 33-33 securedto this angular 5 framework of the plates 24-24 and through the loops in the pair of hingestraps -20 secured to the edges of the hood 10. Four bolts 37-37 (Figs, 2 and 4) secure the lower portions of the metal sheet 28 to the die plate 10 side of this sheet lap around underneath a pair of side lugs 39-39 (Fig. 2) extending outwardly from the stationary die plate 29,

which extensions are screwed to the plates m 24-24 as shown in Fig. 2.

For swinging the hood 10 there is pro- Vided a pair of rocker levers 40-40 which are keyed to the ends of the rod 36 and enga e the lower surfaces of the studs 17-17, go and one of the levers 40 has an integral arm 41 which is pivoted to a link 42. A connecting rod 43 is threaded into the link 42 and into a second lower link 44 which is pivoted to a crank 45 which is in turn keyed to a cross-shaft 46 that actuates the charging pot or pneumatic pump (not shown) of the cast ing machine. The cross-shaft 46 may be actuated by any suitable connection with the movable die plate of the machine and is here .10 shown as actuated by a segmental gear 47 which is covered by a guard 48 which slidably supports a rack 49 which forms a part of a connecting rod 50 which is pivoted at 51 to the movable die plate of the machine. v In the operation of the aforedescribed hood and actuating structure the hood 10 is, of course, down and covering the movable and stationary dies when the two dies are engaging each other for casting purposes, and when the movable die is moved away from the stationary die the shaft 46 is roftated in a clockwise sense by means of the connecting rod 50 and rack and gear 49 and 47; This rotation moves the connecting rod 43 downwardly and rotates the levers 40-40 in a clockwise sense, causing them to bear against the lugs 17-17 to swing thexhood 10 about the hinge straps 20-20 to, the dot and dash position shown in Fig. 2, whereupon the parts cast are removed from the dies; When. the dies are again moved into engagement with each other the connecting .rod 43 is moved upwardly,;due to the actuation of the rack and gear 49 and 47, which are moved by the connecting rod 50 connected at 51 to the movable die, to rock the levers 40-40 in a counterclockwise sense.

The lugs 17-17 resting on the levers 40-40 no then allow the hood to return to its closed position to cover the engaged movable and stationary dies. Theoperator is then protected by the hood from any possibility of being injured by escaping metal, and it will 55 be noted that the hood isautomatically lowvention is not to be limited thereto, but is to 29, and extensions 38-38 (Fig.2) from each I secured to a IIlEtCillIlG tO be, guarded, means ered without the necessity for any attention on the part of the operator.

Although the invention, has been described and illustrated as to one specific embodiment, it will, of course, be understood that the inbe limited only by the scope ofthe appended claims. v

What is claimed is:

l. Ina guarding device, supporting means for covering parts of the machine tobe guarded while the parts are in an operative position, means for horizontally hinging the covering means to the supporting means,

rocker means attached to each side of the covering means, means common to -the rocker means for swinging the covering means, rocker means attached to a shaft of the ma- 7 chine, andmeans connecting the last men- 3|; tioned rockermeans with the means common to the first mentioned rocker means to actuate the first mentioned rocker means.

2. In a guardingdevice, supporting means secured to a machine to be guarded, a hood .90 for covering parts of the machine to be guarded while the parts are in an operative position, means for horizontally hinging the hood to the supporting means, rocker levers 7 attached to the supporting means for swing- .95 ing the hood thereabout, a link connected to one of said rocker levers, a connecting rod secured at one end to the link, a link secured to the other end of thelconnecting rod, and a rocker arm connected to the last mentioned link and secured to a shaft of the machine for swinging the hood over the parts.

3. In a guarding device for a die casting machine, a rocker arm secured to a charging pot rotating shaft of the machine, a connect- 1M5 ing rod pivotally secured to the rocker arm, a supporting means secured to thecasting machine, a cross-shaft horizontally journaled in the supporting means, a rocker arm secured to the cross-shaft and pivotally attached to J the connecting rod for rotating the crossshaft, a three-sided hood freely suspended at one edge from the cross-shaft, a pair of lugs extending outwardly from the hood, and a pair of rocker levers secured to the cross-shaft 1 for engaging the lugs to rotate the hood about the cross-shaft. a In witness whereof, I hereunto subscribe my name this 14th day of April A. D., 1930.

HANS G. GUSTAFSSQN. 1 

